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GHSA-VHV2-9P64-C86Q

Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-09-16 12:30

Details

In the Linux kernel, the following vulnerability has been resolved:

media: chips-media: wave5: Defer job_finish() only when a DEC_PIC was queued

Decoder instances sharing a VPU also share one v4l2_m2m job slot, released when the running context calls v4l2_m2m_job_finish(). While draining, device_run() defers job_finish() once EOS is sent (sent_eos), expecting a later finish_decode() (from a DEC_PIC completion IRQ) to release the slot.

But the m2m core checks job_ready() only when a job is queued, not when it is dispatched. A job queued while draining can run after finish_decode() has already moved the instance to STOP and sent EOS. device_run() then runs in STOP, issues no DEC_PIC, yet still skips job_finish() - so no IRQ, no finish_decode(), and the shared slot is leaked, stalling every instance. With several v4l2h264dec instances in parallel, GStreamer hangs at EOS.

Track whether the run actually queued a DEC_PIC (cmd_issued) and defer job_finish() only then. Otherwise finish the job immediately

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{
  "affected": [],
  "aliases": [
    "CVE-2026-89867"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-16T11:16:54Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: chips-media: wave5: Defer job_finish() only when a DEC_PIC was queued\n\nDecoder instances sharing a VPU also share one v4l2_m2m job slot, released\nwhen the running context calls v4l2_m2m_job_finish(). While draining,\ndevice_run() defers job_finish() once EOS is sent (sent_eos), expecting a\nlater finish_decode() (from a DEC_PIC completion IRQ) to release the slot.\n\nBut the m2m core checks job_ready() only when a job is queued, not when it\nis dispatched. A job queued while draining can run after finish_decode()\nhas already moved the instance to STOP and sent EOS. device_run() then runs\nin STOP, issues no DEC_PIC, yet still skips job_finish() - so no IRQ, no\nfinish_decode(), and the shared slot is leaked, stalling every instance.\nWith several v4l2h264dec instances in parallel, GStreamer hangs at EOS.\n\nTrack whether the run actually queued a DEC_PIC (cmd_issued) and defer\njob_finish() only then. Otherwise finish the job immediately",
  "id": "GHSA-vhv2-9p64-c86q",
  "modified": "2026-09-16T12:30:39Z",
  "published": "2026-09-16T12:30:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89867"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/63d758d2f9dba836d5ae597d317cde522e817cf9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b694ba0a5526a69f78a6924982b1553154ccfd73"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-89867 (GCVE-0-2026-89867)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:31 – Updated: 2026-09-16 10:31

Title

media: chips-media: wave5: Defer job_finish() only when a DEC_PIC was queued

Summary

In the Linux kernel, the following vulnerability has been resolved: media: chips-media: wave5: Defer job_finish() only when a DEC_PIC was queued Decoder instances sharing a VPU also share one v4l2_m2m job slot, released when the running context calls v4l2_m2m_job_finish(). While draining, device_run() defers job_finish() once EOS is sent (sent_eos), expecting a later finish_decode() (from a DEC_PIC completion IRQ) to release the slot. But the m2m core checks job_ready() only when a job is queued, not when it is dispatched. A job queued while draining can run after finish_decode() has already moved the instance to STOP and sent EOS. device_run() then runs in STOP, issues no DEC_PIC, yet still skips job_finish() - so no IRQ, no finish_decode(), and the shared slot is leaked, stalling every instance. With several v4l2h264dec instances in parallel, GStreamer hangs at EOS. Track whether the run actually queued a DEC_PIC (cmd_issued) and defer job_finish() only then. Otherwise finish the job immediately

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/63d758d2f9dba836d…
https://git.kernel.org/stable/c/b694ba0a5526a69f7…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: a176ac5e701f1ba30843c0d7e0663a761bf9a61a , < 63d758d2f9dba836d5ae597d317cde522e817cf9 (git) Affected: a176ac5e701f1ba30843c0d7e0663a761bf9a61a , < b694ba0a5526a69f78a6924982b1553154ccfd73 (git)
Linux	Linux	Affected: 7.0 Unaffected: 0 , < 7.0 (semver) Unaffected: 7.2.5 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/platform/chips-media/wave5/wave5-vpu-dec.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "63d758d2f9dba836d5ae597d317cde522e817cf9",
              "status": "affected",
              "version": "a176ac5e701f1ba30843c0d7e0663a761bf9a61a",
              "versionType": "git"
            },
            {
              "lessThan": "b694ba0a5526a69f78a6924982b1553154ccfd73",
              "status": "affected",
              "version": "a176ac5e701f1ba30843c0d7e0663a761bf9a61a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/platform/chips-media/wave5/wave5-vpu-dec.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.0"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
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              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.5",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "7.0",
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: chips-media: wave5: Defer job_finish() only when a DEC_PIC was queued\n\nDecoder instances sharing a VPU also share one v4l2_m2m job slot, released\nwhen the running context calls v4l2_m2m_job_finish(). While draining,\ndevice_run() defers job_finish() once EOS is sent (sent_eos), expecting a\nlater finish_decode() (from a DEC_PIC completion IRQ) to release the slot.\n\nBut the m2m core checks job_ready() only when a job is queued, not when it\nis dispatched. A job queued while draining can run after finish_decode()\nhas already moved the instance to STOP and sent EOS. device_run() then runs\nin STOP, issues no DEC_PIC, yet still skips job_finish() - so no IRQ, no\nfinish_decode(), and the shared slot is leaked, stalling every instance.\nWith several v4l2h264dec instances in parallel, GStreamer hangs at EOS.\n\nTrack whether the run actually queued a DEC_PIC (cmd_issued) and defer\njob_finish() only then. Otherwise finish the job immediately"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T10:31:37.185Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/b694ba0a5526a69f78a6924982b1553154ccfd73"
        }
      ],
      "title": "media: chips-media: wave5: Defer job_finish() only when a DEC_PIC was queued",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89867",
    "datePublished": "2026-09-16T10:31:37.185Z",
    "dateReserved": "2026-09-11T19:38:34.771Z",
    "dateUpdated": "2026-09-16T10:31:37.185Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-VHV2-9P64-C86Q

CVE-2026-89867 (GCVE-0-2026-89867)

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